Machinery foe



S. T. SANFORD.

Metal'Puncha Patented Jan 13. 1852.

N N nu H Wk 1N MN u w w x R. hN 8 A m tr i s. r. sanronoor ALL-RIVER, MASSACHUSETTS.

. MACHINERY FOR PUNCHING SHEETS or METAL.

To all whom it may concern Be it known that I, SAMUEL T. SANFORD, of Fall River, in the county of Bristol and State of Massachusetts, have invented an companying drawings, letters, figures, and

references thereof.

Of the said drawings Figure 1 denotes a top view of my said improved machine. Fig. 2 is a side elevation of it. Fig. 3 is a central, vertical, and longitudinal section of it. Fig. 4 is a transverse section of it.

In the said drawings A represents the punching cylinder or drum, which consists of a drum or cylinder having a series of punches or points a, (a, a, &c. ext-ended from its periphery and made to enter during the revolutions of the drum corresponding recesses or holes I), b, b, &c. made in the surface of a bed cylinder or drum B'arranged below the drum A as seen in the drawings, the two drums are mountedin a supporting frame C, and have their shafts connected by two equal sized gears D, E, so that they may each revolve at the same speed, and the lower one be revolved when the upper one is put in revolution. In connection with such drums I employ a carriage or movable frame F, which-is supported and made to slide on parallel ways or rails G, H, the said carriage having a rack I of teeth fastened on its upper surface near one edge of it as seen in the drawings. A pinion or gear K fixed on the shaft 0 of the upper punching cylinder engages with the said rack so that when a person lays hold of a crank L (fixed on the said shaft 0) and impart-s to the said shaft a reciprocating circular motion, he will at the same time cause the carriage to move on its ways with a reciprocating rectilinear motion.

To the inner edges of the two side bars 6!, e, of the carriage, two long rest plates or rests M, M, are hinged by hinges as seen at f, f, and in such manner that they may each be turned down from a horizontal to a vertical position. Each of these rests is supported when in a horizontal position on the upper end of a turning lever N, the said lever being made to be supported by and to turn on a fulcrum or pin g, projecting from the inner surface of the side bar of the carriage. The lower arm of the lever projects below the upper edge of the rail G or H, while to the upper arm two springs, 72,, i, are attached and extend in opposite directions from it as seen in Fig. 3, the outer ends being secured to the carriage. These springs serve tobring the lever into an upright p0- sition after the force or power that inclines it may have ceased to act, the power of such springs being also sufiicient to raise up the rest piecethat is over them. Each rail G or H is provided with two small studs or projections m, 02, arranged and projected from its inner surfaceas seen in Fig. 3, each of the projections being sodisposed as to be in the path of the lower arm of the lever N, and to be met by the said arm directly after a sheet of copperplaced on the rests has been passed longitudinally from end to end entirely between the two punching cylinders and been punched.

The above constitutes my said improved machine. Its operation may be thus described. W'hile one workman lays hold of the crank and imparts a reciprocating circular motion to the punching cylinders and a reciprocating rectilinear movement to the carriage, another takes up a sheetof copper or metal and lays it on .the two rests or flaps M, M, while they are in a horizontal position. This done the sheet is carried between the two punching cylinders and after being punched with holes the. lower arms or tails of the small supporting levers of the rests are respectively carried by the continued movement of the carriage against two of the studs m, m or n, n, and tripped so as to cause the levers to turn into a horlzontal position and thus permit the rests to turn or fall down into a vertical position and thereby discharge the sheet or allow it to drop off the same by the action of grav ity. As soon as the carriage is next moved in an opposite direction the springs are suffered to act and elevate the levers into vertical positions and so as at the same time to elevate the rests into a horizontal position ready to receive another sheet of copper. Thus the sheets are laid 0-11 the rests of the carriage, carried between the punches or punching cylinders andlpunched, and finally discharged from the machine the rests of which after the discharge of each sheet being brought up or reset ready to receive another sheet. i

i What I claim as my improvement is- The combination of the hinged flaps M,

M, and their levers N, N, restoring springs my signature, this eighth day of December and tripping studs or equivalent mechanic A. D. 1851. contrivances With the movable carriage F and the puriching cylinders 01* mechanism, SAMUEL SANFORD b the Whole being arranged and made to 0p- Witnesses:

erate substantially as hereinbefore specified. ALMANZA S. LINDSEY,

In testimony whereof I have hereto set JOHN LINDSEY. 

